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Unrooted phylogenetic analyses of SARS-CoV-2 omicron sublineage BA.1 variant based on full genome sequences (nt positions 202–29,745, 29,544 bp). Bootstrap values for key nodes are shown as percentages of 1000 replicates. All SARS-CoV-2 omicron sublineage BA.1 variants identified in this study are represented and labeled. Scale bars represent the number of substitutions per site.
